Guard by_name kwarg for pydantic < 2.11

[xyf5432]

Summary

polyfactory/factories/pydantic_factory.py:570 calls
cls.__model__.model_validate(kwargs, by_name=True) when __by_name__ is set.

The by_name keyword argument was added to model_validate in pydantic 2.11.0.
On pydantic < 2.11 it raises

TypeError: BaseModel.model_validate() got an unexpected keyword argument 'by_name'

(verified on pydantic 2.10.6).

The project declares pydantic[email]>=2.10.4, which permits versions below
2.11, so the option can only be used on pydantic >= 2.11 in practice.

Impact

• TypeError at factory build time on pydantic 2.10.4–2.10.x when a factory
  sets __by_name__ = True.
• The declared minimum (2.10.4) does not actually support the feature.

Suggested fix

Guard the by_name argument with a pydantic version check, keeping the
existing behavior on pydantic >= 2.11:

if cls.__by_name__ and _is_pydantic_v2_model(cls.__model__):
    if _PYDANTIC_HAS_BY_NAME:  # pydantic >= 2.11
        return cls.__model__.model_validate(kwargs, by_name=True)
    return cls.__model__.model_validate(kwargs)

Alternatively, raise the minimum declared version to pydantic>=2.11.